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¿Âµµ¿¡ µû¸¥ ¹°ÀÇ ¹Ðµµ(density of water), The Kell (new) formulation

ÀÛ¼ºÀÚ Uploader : dutyfree ÀÛ¼ºÀÏ Upload Date: 2017-06-22º¯°æÀÏ Update Date: 2022-05-01Á¶È¸¼ö View : 992

The Kell calculated values of ¥ñ were fitted over the temperature range 5 to 40 ¡ÆC on the new 1990 International Temperature Scale (ITS-90) to an equation quartic in temperature. The equation is

¥ñ = 999.85308+6.32693*10^(-2)*t-8.523829*10^(-3)*t^2+6.943248*10^(-5)*t^3-3.821216*10^(-7)*t^4

In contrast with the Kell formulation, a term in t^5 is not necessary due at least in part to the fact that the 0 to 4 ¡ÆC region, in which ¥ñ increases with increasing temperature, has been excluded. Equation  applies to air-free water.

*** Âü°í¹®Çå[References] ***

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4909168/
¥ñ = 999.85308+6.32693*10^(-2)*t-8.523829*10^(-3)*t^2+6.943248*10^(-5)*t^3-3.821216*10^(-7)*t^4
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